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Our marine engines for auxiliary applications give you low cost of ownership, excellent fuel economy and competitive prices both for engine and parts. Auxiliary engines generate a vessel's on-board electricity, so they need to be quick to start and feature low noise and low emissions. For heavy duty requirements, such as powering a large fishing vessel's electrically driven net haul system, you really need the extra power that a dedicated auxiliary engine will give to you – rather than generating electricity from the propulsion engine.


Vertical inline 4 cylinder

4.4 litre

93.6-117.5 kW (@110%)

Based on 1104 range

Power Rating

Minimum Power 125.5 HP 93.6 kW Less
Maximum Power 143.2 HP 106.8 kW Less
Maximum Torque 459.5 lb-ft @ 1800 rpm 623.0 Nm @ 1800 rpm Less
Rated Speed 1500-1800 rpm 1500-1800 rpm Less


Bore 4.1 in 105.0 mm Less
Stroke 5.0 in 127.0 mm Less
Displacement 286.5 in³ 4.4 l Less
Aspiration Turbocharged air to water cooled Turbocharged air to water cooled Less
Rotation from Flywheel End Clockwise Clockwise Less
Total Coolant Capacity 4.0 gal (US) 15.0 l Less
Total Lubricating Capacity 4.0 gal (US) 15.0 l Less
Combustion System Direct injection Direct injection Less
Cycle 4 stroke 4 stroke Less
Compression Ratio 19.3:1 19.3:1 Less
Number of Cylinders 4 inline 4 inline Less
Cooling System Liquid Liquid Less

Engine Dimensions*

Wet Weight 1150.8 lb 522.0 kg Less
Dry Weight 1036.0 lb 470.0 kg Less
Height 50.1 in 1272.0 mm Less
Length - Flywheel Housing 33.2 in 844.0 mm Less
Width 29.7 in 754.0 mm Less


Note 1 Final dimensions dependent on selected options Final dimensions dependent on selected options Less


Gear-driven water pumps ensure maximum cooling efficiency. Inserted valve seats, oil spray cooled pistons and compact plate oil cooler give enhanced engine life.

Low cost of ownership

Competitive engine and parts pricing, 500 hour service intervals and low fuel consumption ensure our engines bring significant owner savings.

Low noise and low emissions

Our auxiliary marine engines give exceptionally low noise and are designed to meet a variety of emission standards.

Reliable power

High compression ratios ensure rapid starting in all conditions. Engines suitable for operation in ambient temperatures up to 50°C and seawaters up to 38°C. Fuelled starting aids for temperatures down to -15°C.

4.4TW2GM Standard Equipment

Air inlet system
  • Air filter
  • Closed engine breather system
  • Water jacketed exhaust manifold

Control system
  • Electronic governor (control to ISO 8528 G3)
  • Wiring harness with 23 way connector

Cooling system
  • Deareation headertank
  • Gear driven fresh and auxiliary water pumps
  • Thermostatically controlled cooling water system

Fuel system
  • Rotary fuel injection pump
  • Spin on fuel oil filter and separator

Oil system
  • Flat bottomed cast iron sump
  • Spin on full flow lubrication oil filter with integral lubrication oil cooler on left side of engine